National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

Guam International Airport (PGUM)

Lat: 13.48°NLon: 144.8°EElev: 304ft.

Mostly Cloudy

76°F

24°C

Humidity 85%
Wind Speed NE 7 mph
Barometer 29.86 in (1010.2 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 21 Mar 3:54 am ChST
Extended Forecast for

Agat GU

High Surf Advisory March 21, 04:51am until March 22, 04:00pm
Click here for hazard details and duration
High Surf Advisory
  •  
    High Surf Advisory March 21, 04:51am until March 22, 04:00pm

    NOW until 4:00pm Sun

    High Surf Advisory

  • Today

    High: 84 °F

    Isolated
    Showers

  • Tonight

    Tonight: Isolated showers. Partly cloudy, with a low around 74. East northeast wind 13 to 17 mph, with gusts as high as 23 mph.

    Low: 74 °F

    Isolated
    Showers

  • Sunday

    Sunday: Isolated showers. Mostly sunny, with a high near 85. East northeast wind 14 to 20 mph, with gusts as high as 26 mph.

    High: 85 °F

    Isolated
    Showers

  • Sunday Night

    Sunday Night: Isolated showers. Partly cloudy, with a low around 75. East northeast wind 11 to 17 mph, with gusts as high as 23 mph.

    Low: 75 °F

    Isolated
    Showers

  • Monday

    Monday: Isolated showers. Mostly sunny, with a high near 85. East northeast wind 15 to 20 mph, with gusts as high as 25 mph.

    High: 85 °F

    Isolated
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 74.

    Low: 74 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 85.

    High: 85 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 75.

    Low: 75 °F

    Chance
    Showers

Detailed Forecast

Today
Isolated showers. Mostly sunny, with a high near 84. East northeast wind 9 to 17 mph, with gusts as high as 23 mph.
Tonight
Isolated showers. Partly cloudy, with a low around 74. East northeast wind 13 to 17 mph, with gusts as high as 23 mph.
Sunday
Isolated showers. Mostly sunny, with a high near 85. East northeast wind 14 to 20 mph, with gusts as high as 26 mph.
Sunday Night
Isolated showers. Partly cloudy, with a low around 75. East northeast wind 11 to 17 mph, with gusts as high as 23 mph.
Monday
Isolated showers. Mostly sunny, with a high near 85. East northeast wind 15 to 20 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 74.
Tuesday
Partly sunny, with a high near 85.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 75.
Wednesday
Partly sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 76.
Thursday
Mostly sunny, with a high near 88.
Thursday Night
Mostly cloudy, with a low around 76.
Friday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Agat GU
 13.38°N 144.67°E
Last Update:
4:30 am ChST Mar 21, 2026
Forecast Valid:
4am ChST Mar 21, 2026-6pm ChST Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation